There are also two tutorials on the Graal Bible, but I don't think they're as good. (One of them is a bit too quick to jump to the hard stuff, and the other I'm pretty sure no human could understand without having coded before)

You should also take a look at Testbed Server. Partly because it's a good place to practice, and partly because there are other people there who are willing to help you out with stuff.

*SlikRick: so should I even ask about your aim status?
*Xor: well if you want to
*Xor: but i am LARPING
*SlikRick: While on a computer?
*Xor: yes
*Xor: in my living room
*SlikRick: ahh
*Xor: i have a fort setup to hide from beasts